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Science Chemistry C5
All questions on science test included. (HOLT)
7
Chemistry
8th Grade
02/22/2017

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Cards

Term
What is a compound?
Definition
A group of chemically combined substances.
Term
What is a mixture?
Definition
Substances that can be seperated from each other but are still combined.
Term
Describe the charecteristics of a network solid.
Definition
An ionic bond, high melting and boiling point, very hard to break (Ex. Salt)
Term
Describe the characteristics of a molecular compound.
Definition
Low melting and boiling point, poor conductor of electricity. Formed by the sharing of elections between substances.
Term
What joins atoms or ions in compounds?
Definition
The need for atoms to gain full levels of electrons in order to gain stability. (Form chemical bonds)
Term
How are ionic bonds formed?
Definition
When an atom, typically a metal, loses an electron (or electrons) and becomes a positive ion or cation.
Term
How are metallic bonds formed?
Definition
A bond formed by the attraction between positively charged metal ions and the electrons around them.
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